Burg Rheinfels
The castle ruins overlooking the town bear witness to the fact that St. Goar was once the best-fortified town in the Mittelrhein. From its beginnings in 1245, it was repeatedly enlarged by the counts of Katzenelnbogen, a powerful local dynasty, and their successors, the Landgraviate of Hesse. Rheinfels was finally demolished by the French in 1797. Take time for a walk through the impressive ruins and the museum, which has a detailed model of how the fortress looked in its heyday. It's a steep ascent by foot, but between 11 am to 5 pm, the cab company Papst will take you from the Katholische Kirche to the castle and back.